With optics you tend to get what you pay for, though at the top
end the differences become quite small.
Even cheap optics seem quite good when you start out, but my
personal experience is that as one gains experience one soon
becomes aware of the deficiencies.
It took me several weeks to get accustommed to my scope (Viking).
I had gone in expecting to buy the RSPB scope, but shelled out
a lot more for a lot more clarity. Reading sign posts is a quick
way to tell.
A big bright image looks great - soon it may become apparent that
the colours are not clear and that there is a slight blur on the
sharp edges. This happened to me with a Russian built scope
that I bought off eBay - It took me a couple of weeks to realize
I could make out more detail in the smaller image of my medium
priced Bins
There are some birders who seem to worry about having the right
image / badge on their equipemt. But to be honest, most have chosen
very carefully.
IMO the best way to chose optics is to go to a busy reserve and
ask others to have a look through their equipment. You will get
very few rejections (unless there is something very unusual about!).
Many of us love to bore the pants off others by talking about such
things.
Spotty teenagers in high street shops know nothing about optics.
It is also very hard to try out a scope in a store, or even outside
on the pavement.
Optics shops on reserves, including the RSPB bigger centres not
only usually have someone who knows what they are talking about,
and uses optics regularly, but they also will let you try two or
three scopes side by side. (Make sure they are on equivalent tripods)
e.g. Cley Spy, has a wonderful viewing area over the Cley Marshes (North Norfolk).
Sadly you won't find the cheaper ranges there though - I guess they
don't like dissatisfied customers
Where are you?
I am sure there are WAB members who be happy to meet up and let
you try their equipment.
Finally - don't stint on a tripod. A sturdy tripod with silky smooth
panning and locking makes all the difference - again I learnt this
the hard way; though in hides I often just rest on the window-ledges.
Don't rush - you will regret it!